J. Korean Ceram. Soc. > Volume 22(2); 1985 > Article
 Journal of the Korean Ceramic Society 1985;22(2): 44.
 $K_2O-SiO_2-TiO_2$ 계 유리의 결정화 김성식, 박현수1 한국과학기술원 재료공학과1전남대학교 공대 무기 재료공학과 Crystallization of $K_2O-SiO_2-TiO_2$ Glasses ABSTRACT The crystallization behavior of $K_2O-SiO_2$ glasses with added $TiO_2$ and the effect of $TiO_2$ on internal nuleation at temperature in the range of 875 to 121$0^{circ}C$ have been investigated by means of X-ray diffractometry optical microscopy and scanning electron microscopy. The crystalline phase of these glasses identified by X-ray diffractometry is cristbalite. The scanning electron microspcopy reveals a two-phase layer of dendritic crystals and intersitial melt which grow from the surface at a constant rate, The observed crystallization rates are consistent with a diffusion-controlled mechanism. An equation relating viscosity and undercooling to growth rate is presented.
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